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From residential to industrial our low pitch metal roof waterproofing system leaves you stress free

Our approved five-layer torch-on waterproofing and insulation system can be used to protect most metal roof types such as standard IBR, widespan IBR, corrugated, Brownbuilt, Klip-lok, and in most cases all metal sheets.

Up to 10 year warranty

Qualified torch-on applicators

Free on-site assessment

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Low pitched metal roofs are the ones water finds first

A lap joint shifts a milimeter, a fastener works loose in the wind, and the leak shows up on your ceiling board weeks before you'd ever spot it on the roof itself. By then it's not a small job anymore but our solution will have it fixed before the next rains.

Step 1

Prep & Anchor

Prep and clean, treat rust as needed and secure roof anchors .

Metal roofs
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Step 2

Insulate the Sheeting

1 x layer 25mm 15DV Multidex insulation panels (EPS product), we are the only installer of this product as it has a fire retardant and fire rating.
We can customize the insulation panels to suit specific insulation and noise requirements as needed by the client.

Step 3

Add the Support Panel

1x 3.2mm Multidex support panel, this is to strengthen the system and to provide a flat smooth surface for the application of the torchon waterproofing layer.

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Torch On

Step 4

Fasten It Down

The support panel as well as the insulation panel is secured to the existing metal sheeting with 75mm fasteners and 56mm polycarbonate fire resistant Multidex washers, please note that our specific washer is branded under our specifications. This is secured at a rate of 6 fasteners per flat sqm.

Step 5

Flash the Gutters

Gutter junction is cut back to the backend of the existing gutters installed to allow for the installation of the Multidex galvanized flashing to ensure a secure and sealable bend into the gutter junction, this eliminates the back flow of storm water into the building structure.

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Step 6

Seal with Torchon

1 x layer of the 4mm torchon system is installed over the above layers, the application of the torchon is either Derbigum, ThermoDual and Torch Dual. All of the torchons are supplied by the longest standing suppliers in South Africa and we have their full backing. We have been approved applicators of the torchons since 1982. The torchon’s are gas welded to ensure a good and proper seal throughout.

Step 7

Coat & Protect

1 x layer protective aluminium coating is applied as the final coating to ensure longevity and protection from our African sun.

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Trusted by homeowners, corporates, and many more

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Henry profile picture
Henry
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Excellent Service from Multidex!
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Marnus Viljoen profile picture
Marnus Viljoen
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Great work very affective
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BELINDA Martens profile picture
BELINDA Martens
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After years of a leaking roof and temporary fixes we have finally had our roof repaired through Multidex. After the recent heavy rains we are leak free. Thank you to Shaun and his team for the excellent service.
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Willem Van de Venter profile picture
Willem Van de Venter
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I had to do some serious waterproofing of the roof and Multi-Dex delivered!! From the initial consultation through to the completion of the work, their expertise and professionalism was clearly visible. I am extremely happy with the end result and would definitely recommend Shaun and his team! Great work guys!!!!
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Anthony Sardinha profile picture
Anthony Sardinha
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My go to as a contractor! All the experience they have cannot be bought. Would definitely recommend them over and over again
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Themba Austin Mathebula profile picture
Themba Austin Mathebula
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Best system in South Africa.
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Mitch Miarino profile picture
Mitch Miarino
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Great service and excellent staff with years of experience and knowledge. Shaun was fantastic. Really did a great job. Thanks team.
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Seth Scott profile picture
Seth Scott
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I have used Multi-Dex for over 10 years on my own properties as well as a subcontractor, and I wouldn't use anyone else for torch-on waterproofing
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Christine Stallard profile picture
Christine Stallard
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From speaking to Shaun and receiving quote to team on site and job finished....excellent professional, helpful and friendly service. Then site left in immaculate clean and tidy order Family and friends have used Multidex for many years now and will continue to do so for many more.
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Get Your Free Metal Roof Assessment

Tell us about your leak and we'll get back to you within one business day. Free on-site assessment, no obligation.

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